US2581820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soldering flux
Assignee: SPX Technologies Inc
•
Filing: 1949-06-01
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Granted: 1952-01-08
•
Expires: 1969-06-01
Abstract
No abstract record available.
Inventors
- 👤 Benjamin M Stright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:29
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3612
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
AN ESSENTIALLY NON-CORROSIVE SOLDERING FLUX FOR METALS CONSISTING OF A LIQUID VEHICLE OF WATER AND ALCOHOL INCLUDING LESS THAN ONE PERCENT BY WEIGHT OF A WETTING AGENT, AND LACTIC ACID AND UREA IN SAID VEHICLE ACTING JOINTLY AS FLUXING AGENTS AND CONSTITUTING BY WEIGHT A MINOR PROPORTION OF THE TOTAL FLUX, THE SAID LACTIC ACID BEING IN GREATER PROPORTION THAN THE SAID UREA.
References Cited (Backward Citations)
US325579A
Cited
GB353758A
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US1785155A
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US1785135A
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US1989557A
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US1929895A
Cited
DE614708C
Cited
US2089095A
Cited
US2095335A
Cited
US2480723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |